Check for axminster-loom-needle motion



June 8 i926.

w. E. MCCLEARY CHECK FOR AXMINSTER LOOM NEEDLE MOTION Filed Deo. 1, 1925NN @N Patented June 8, 1926.

UNITED STATES PATENT OFFICE.

WILLIAM E. MCCLEARY, OF WORCESTER, MASSACHUSETTS, ASSIGNOR T CROMPTON &KNOWLES LOOM WORKS, 0F WORCESTER, MASSACHUSETTS, A CORPORATION OFMASSACHUSETTS.

CHECK FOR AXMINSTER-LOOM-NEEDLE MOTION.

Application led December 1, 1925. Serial No. 72,583.

This invention relates to needle motions for Axminster looms and it isthe general object of the invention to control the inner or weft layingstroke of the needle to the end that the needle may be accuratelypositioned with respect to the selvage shuttle located at the oppositeend of the loom.

Axminster looms of the wide type usually employ a cotton cable or ropeto move the needle into and-out of the shed of the loom but it is foundthat this rope is subject to undesirable stretching which results ininaccurate positioning of the needle. Various substitutes for the cottoncable have been used from time to time' but none have provedsatisfactory. The needle is moved into the shed by one portion of thecable and is withdrawn from the shed by the other portion so that bothends of the cable Stretch. rIhe bottom of the advancing end of theneedle is formed with a recess through which the selvage shuttle passesto interloop the filling of the needle and the selvage warp thread ofthe shuttle and this recess must lie in the path of the shuttle. Due tostretching of the withdrawing portion of the cable the needle is foundto move beyond the proper position for registry with the shuttle, and itis a further object of my invention to prevent this objectionable excessmovement of the needle beyond the selvage shuttle by supplying aflexible relatively inelastic member to follow the needle carrier andposition the needle properly.

The motion of the needle is derived from a crank so that the needle ismoving slower at the end of its stroke than it is at the middle portionof its movement and it is found where slackness has developed in thewithdrawing portion of the cable that the needle will lead the insertingportion of the cable and it is a still further object of my invention toprevent improper movement of the needle by controlling the same througha flexible relatively inelastic member which moves at substantially thesame rate of speed as the inserting portion of the cable. e f With theseand other objects in View which will appear as the description proceeds,my invention resides in the combination and arrangement of partshereinafter described and set forth in the claims.

In the accompanying drawings wherein I have shown a convenientembodiment of my invention,

Fig. 1 is a rear eleva-tion of the needle motion of a loom having myinvention applied thereto,

Figs.` 2, 3, and 4 are vertical sections on lines 2-2, 3-3, and 4 4,respectively, of Fig.- 1,

Fig. 5 is an enlarged rear elevation of the needle carrier showing myauxiliary relatively inelastic flexible member attached thereto talzenin the direction of arrow 5, Fig. 3,

Fig. 6 is an enlarged fragmentary section through the drum showing themethod of attaching the auxiliary flexible'member thereto,

Fig. 7 is a front elevation of the drum taken in the direction of arrow7, Fig. 2, and

Fig. 8 is a detail section on line 8+8 of Fig. 1.

Referring to the drawings it will be seen that I have provided a loomframe 10 from which extends laterally a needle frame 11 having supportedthereon a needle rail 12 provided with a groove 13 in which moves a shoe14. Said shoe is formed as part of a needle carrier 15 to which issecured the outer end of a needle 16 and said carrier has a cap 17 bymeans of which a cable 18 is clamped to the carrier. The needle rail haspivotally mounted thereon outer and inner sheaves 19 and 20,respectively, around which the cable extends and the ends of said cableare secured to a cable drum 21 shown in Figs. 3 and 7. As shown in Fig.3 said drum is formed with flanges 22 and Q3 defining an area for thecable and said drum is further provided with a pair of openings 24C and25, respectively, through which the ends of the cable extend. The endsas shown in Fig. 7 are held tightly in place by means of clamps 26 heldin position by bolts 27.

The drum is keyed to a shaft 28 to which is secured a pinion 29 meshingwith a segment 30 pivoted as'at 31. A connector 32 is attached to thesegment as at. 33 and has l (Jil give the needle a yarn insertingmovement and to withdraw the needle, and an auX- iliary flexible devicerelatively inelastic and operatively connected to the needle to restrainundue advance movement of the needle throughout the whole yarn insertingmovement of the needle.

5. In aneedle motion for Axminster looms, a needle having yarn insertingand withdrawing movements, a flexible cable having a portion operativeto give the needle a yarn inserting movement and having another portionoperative to withdraw the needle, a flexible relatively inelastic membereffective throughout the yarn inserting motion of the needle to restrainundue forward movement of the latter which might be permitted byslaclrness of the needle withdrawing portion of the cable, and means totake up slackness of the needle withdrawing portion of the cable, themember being effective to check the motion of the needle irrespective ofthe amount of slack taken up l by said means.

6. In a needle motion for Axminster looms, a rotatable member, a needle,flexible connections between the member and the needle to give thelatter a yarn inserting and withdrawing movement, and a iiexiblerelatively inelastic element operatively congest-ed to the needle andthe rotatable mem- 7 In a needle motion for Axininster looms, a needlehaving yarn inserting and withdrawing movements, and a pair of flexiblemembers operatively connected to the needle, one of said members beingsubject to stretching during normal use and the other of said membersbeing relatively inelastic and tending to resist undue movement of' theneedle rendered possible by slackness or stretching of the first member.

8. In a needle motion for Axminster looms, a needle, a flexible memberconnected to the needle and having a portion to give said needle a yarninserting movement and having another portion to give said needle awithdrawing movement, a relatively inelastic flexible member operativelyconnected to the needle, and means to wind up and unwind said member,said means unwinding the relatively inelastic member at substantiallythe same rate of speed as the yarn inserting portion of the first namedmember is wound up.

In testimony whereof I have hereunto aiXed my signature.

WILLIAM E. MCCLEARY.

